The Experts below are selected from a list of 27 Experts worldwide ranked by ideXlab platform
Agnieszka Kalwasinska - One of the best experts on this subject based on the ideXlab platform.
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epiphytic bacteria inhabiting the Yellow Waterlily nuphar luteum l
Polish Journal of Environmental Studies, 2002Co-Authors: W Donderski, Agnieszka KalwasinskaAbstract:Studies on the development dynamics and the physiological properties of heterotrophic bacteria growing on the surface of the Yellow Waterlily {Nuphar luteum L.) during the plants' development cycle were carried out. It was stated that the number of the epiphytic bacteria is different in the examined sections of the plant. The number is higher on bottom parts of petioles and rhizomes but lower on the surface of leaf blades and petioles beneath the leaf blade. The number of the epiphytic bacteria oscillated between 0.54 x 10 6 and 37.85 x 10 6 cells per lg of wet weight of the plant. The gram negative rods dominated among the epiphytic bacteria, the majority of which was slowly growing strains. Among the epiphytic bacteria the most numerous strains were those hydrolyzing fat, starch, and protein; the least numerous were the chitinolytic bacteria.
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Epiphytic Bacteria Inhabiting the Yellow
2002Co-Authors: Waterlily Luteum L, W Donderski, Agnieszka KalwasinskaAbstract:Studies on the development dynamics and the physiological properties of heterotrophic bacteria growing on the surface of the Yellow Waterlily {Nuphar luteum L.) during the plants ' development cycle were carried out. It was stated that the number of the epiphytic bacteria is different in the examined sections of the plant. The number is higher on bottom parts of petioles and rhizomes but lower on the surface of leaf blades and petioles beneath the leaf blade. The number of the epiphytic bacteria oscillated between 0.54 x 106 and 37.85 x 106 cells per lg of wet weight of the plant. The gram negative rods dominated among the epiphytic bacteria, the majority of which was slowly growing strains. Among the epiphytic bacteria the most numerous strains were those hydrolyzing fat, starch, and protein; the least numerous were the chitinolytic bacteria
Gary P Sullivan - One of the best experts on this subject based on the ideXlab platform.
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heterophylly in the Yellow Waterlily nuphar variegata nymphaeaceae effects of co2 natural sediment type and water depth
American Journal of Botany, 2001Co-Authors: John E. Titus, Gary P SullivanAbstract:We transplanted Nuphar variegata with submersed leaves only into natural lake sediments in pH-, [CO2]-, depth-, and temperaturecontrolled greenhouse tanks to test the hypotheses that more fertile sediment, lower free [CO 2], and shallower depth would all stimulate the development of floating leaves. Sediment higher in porewater [NH 4 1 ] favored floating leaf development. Low CO 2-grown plants initiated floating leaf development significantly earlier than high CO 2-grown plants, which produced significantly more submersed leaves and fewer floating leaves. Mean floating leaf biomass was significantly greater than mean submersed leaf biomass but was not influenced by CO 2 enrichment, whereas mean submersed leaf biomass increased 88% at high [CO2]. At the shallower depth (35 cm), floating leaves required 50% less biomass investment per leaf than at 70 cm, and a significantly greater proportion of plants had floating leaves (70 vs. 23‐43% at 35 vs. 70 cm, respectively) for the last three of the eight leaf censuses. Sediment type, water depth, and especially free [CO2] all can influence leaf morphogenesis in Nuphar variegata,and the development of more and larger submersed leaves with CO2 enrichment favors the exploitation of high [CO2] when it is present in the water column.
W Donderski - One of the best experts on this subject based on the ideXlab platform.
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epiphytic bacteria inhabiting the Yellow Waterlily nuphar luteum l
Polish Journal of Environmental Studies, 2002Co-Authors: W Donderski, Agnieszka KalwasinskaAbstract:Studies on the development dynamics and the physiological properties of heterotrophic bacteria growing on the surface of the Yellow Waterlily {Nuphar luteum L.) during the plants' development cycle were carried out. It was stated that the number of the epiphytic bacteria is different in the examined sections of the plant. The number is higher on bottom parts of petioles and rhizomes but lower on the surface of leaf blades and petioles beneath the leaf blade. The number of the epiphytic bacteria oscillated between 0.54 x 10 6 and 37.85 x 10 6 cells per lg of wet weight of the plant. The gram negative rods dominated among the epiphytic bacteria, the majority of which was slowly growing strains. Among the epiphytic bacteria the most numerous strains were those hydrolyzing fat, starch, and protein; the least numerous were the chitinolytic bacteria.
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Epiphytic Bacteria Inhabiting the Yellow
2002Co-Authors: Waterlily Luteum L, W Donderski, Agnieszka KalwasinskaAbstract:Studies on the development dynamics and the physiological properties of heterotrophic bacteria growing on the surface of the Yellow Waterlily {Nuphar luteum L.) during the plants ' development cycle were carried out. It was stated that the number of the epiphytic bacteria is different in the examined sections of the plant. The number is higher on bottom parts of petioles and rhizomes but lower on the surface of leaf blades and petioles beneath the leaf blade. The number of the epiphytic bacteria oscillated between 0.54 x 106 and 37.85 x 106 cells per lg of wet weight of the plant. The gram negative rods dominated among the epiphytic bacteria, the majority of which was slowly growing strains. Among the epiphytic bacteria the most numerous strains were those hydrolyzing fat, starch, and protein; the least numerous were the chitinolytic bacteria
John E. Titus - One of the best experts on this subject based on the ideXlab platform.
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heterophylly in the Yellow Waterlily nuphar variegata nymphaeaceae effects of co2 natural sediment type and water depth
American Journal of Botany, 2001Co-Authors: John E. Titus, Gary P SullivanAbstract:We transplanted Nuphar variegata with submersed leaves only into natural lake sediments in pH-, [CO2]-, depth-, and temperaturecontrolled greenhouse tanks to test the hypotheses that more fertile sediment, lower free [CO 2], and shallower depth would all stimulate the development of floating leaves. Sediment higher in porewater [NH 4 1 ] favored floating leaf development. Low CO 2-grown plants initiated floating leaf development significantly earlier than high CO 2-grown plants, which produced significantly more submersed leaves and fewer floating leaves. Mean floating leaf biomass was significantly greater than mean submersed leaf biomass but was not influenced by CO 2 enrichment, whereas mean submersed leaf biomass increased 88% at high [CO2]. At the shallower depth (35 cm), floating leaves required 50% less biomass investment per leaf than at 70 cm, and a significantly greater proportion of plants had floating leaves (70 vs. 23‐43% at 35 vs. 70 cm, respectively) for the last three of the eight leaf censuses. Sediment type, water depth, and especially free [CO2] all can influence leaf morphogenesis in Nuphar variegata,and the development of more and larger submersed leaves with CO2 enrichment favors the exploitation of high [CO2] when it is present in the water column.
Laura Gola - One of the best experts on this subject based on the ideXlab platform.
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Effectiveness of coypu control in small Italian wetland areas
Wildlife Society Bulletin, 2005Co-Authors: Sandro Bertolino, Aurelio Perrone, Laura GolaAbstract:Introduced coypu (Myocastor coypus) damage crops and natural vegetation and undermine riverbanks. We controlled coypu with cage traps to protect vegetation in 3 wetlands in the Park of the Rivers Po and Orba (northwestern Italy). During a 3-year trial, coypu were controlled in the Natural Reserve of Valenza (NRV), an area with a low degree of colonization, but not in one with a high immigration rate. In NRV park wardens were involved for 18 man-days of work annually, and the cost was 1,518 Euros (1,867 U.S. dollars) per year. From 2001 a control program was carried on in the 3 areas. Removal densities (0.06–1.3 animal/ha) suggested that 2 trapping periods annually were adequate to slow down coypu population increase. The recovery of Yellow Waterlily (Nuphar lutea) in 3 plots and colonization of new ponds by vegetation indicated that coypu were maintained at a level sustainable for vegetation development.